6 1/2 x 9 1/2 Booklet Envelope - 24# White - Open Side (6.5 x 9.5) - Large Envelope Series (Pkg of 50) A Quantity of 50 - 6 1/2 x 9 1/2 Booklet Envelope - White 24# White Paper - Standard Gummed Flap. Great for mailing invoices, catalogs, booklets, statements, checks, letters, and more. This envelope may be sourced from any one of a number of top brands. Ships via First Class Mail